Labour claims it's enjoying a last-minute surge in leaked internal polling.

It puts Labour on 30 percent, National on 35, the Greens on 13, Act on 8, and Te Pati Maori on 4.

It would have the left bloc overtaking the right - 47 percent to 43 percent.

Newstalk ZB Political Editor Jason Walls is urging scepticism.

He told Heather du Plessis-Allan with New Zealand First on 6 percent, this still makes Winston Peters kingmaker.

“I would take this with more than a pinch of salt. I mean, we don’t talk about parties’ internal polls like they’re the gospel, but this is just a way the Labour Party will shore up their support and get to the polls.”

LISTEN ABOVE